        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        header {
            text-align: center;
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 1px solid #eaeaea;
            position: relative;
        }
        
        header h1 {
            color: #2c3e50;
            font-size: 2.5rem;
            margin-bottom: 10px;
        }
        
        header p {
            color: #7f8c8d;
            font-size: 1.1rem;
        }
        
        .cart-icon {
            position: absolute;
            top: 0;
            right: 0;
            display: flex;
            align-items: center;
            background: white;
            padding: 10px 15px;
            border-radius: 30px;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .cart-icon:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
        }
        
        .cart-icon svg {
            width: 24px;
            height: 24px;
            fill: #2c3e50;
        }
        
        .cart-count {
            background: #e74c3c;
            color: white;
            border-radius: 50%;
            width: 22px;
            height: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: bold;
            margin-left: 8px;
        }
        
        .product-container {
            display: flex;
            flex-wrap: wrap;
            background: white;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            overflow: hidden;
        }
        
        .product-images {
            flex: 1;
            min-width: 300px;
            padding: 30px;
            background: #f9f9f9;
        }
        
        .main-image {
            width: 100%;
            height: 400px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            border-radius: 8px;
            overflow: hidden;
            background: white;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
        }
        
        .main-image img {
            max-width: 100%;
            max-height: 100%;
            object-fit: contain;
            transition: transform 0.3s ease;
        }
        
        .thumbnail-container {
            display: flex;
            justify-content: center;
            gap: 10px;
        }
        
        .thumbnail {
            width: 70px;
            height: 70px;
            border-radius: 6px;
            overflow: hidden;
            cursor: pointer;
            border: 2px solid transparent;
            transition: all 0.2s ease;
            background: white;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .thumbnail.active {
            border-color: #3498db;
        }
        
        .thumbnail img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }
        
        .product-details {
            flex: 1;
            min-width: 300px;
            padding: 30px;
            background: white;
        }
        
        .product-title {
            font-size: 1.8rem;
            margin-bottom: 10px;
            color: #2c3e50;
        }
        
        .product-price {
            font-size: 1.5rem;
            font-weight: bold;
            color: #e74c3c;
            margin-bottom: 20px;
        }
        
        .product-description {
            color: #7f8c8d;
            margin-bottom: 25px;
            line-height: 1.7;
        }
        
        .option-section {
            margin-bottom: 25px;
        }
        
        .option-title {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 12px;
            color: #2c3e50;
        }
        
        .color-options {
            display: flex;
            gap: 12px;
        }
        
        .color-option {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            cursor: pointer;
            border: 2px solid transparent;
            transition: all 0.2s ease;
            position: relative;
        }
        
        .color-option.active {
            border-color: #3498db;
            transform: scale(1.1);
        }
        
        .color-option.active::after {
            content: '✓';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: white;
            font-size: 14px;
            font-weight: bold;
            text-shadow: 0 0 2px rgba(0, 0, 0, 0.5);
        }
        
        .size-options {
            display: flex;
            gap: 12px;
        }
        
        .size-option {
            padding: 10px 18px;
            border: 2px solid #e0e0e0;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.2s ease;
            font-weight: 500;
        }
        
        .size-option.active {
            border-color: #3498db;
            background-color: #3498db;
            color: white;
        }
        
        .stock-status {
            padding: 12px;
            border-radius: 6px;
            margin-bottom: 25px;
            font-weight: 500;
        }
        
        .in-stock {
            background-color: #d4edda;
            color: #155724;
        }
        
        .low-stock {
            background-color: #fff3cd;
            color: #856404;
        }
        
        .out-of-stock {
            background-color: #f8d7da;
            color: #721c24;
        }
        
        .add-to-cart {
            display: flex;
            gap: 15px;
            margin-bottom: 25px;
        }
        
        .cart-btn {
            flex: 1;
            background: #3498db;
            color: white;
            border: none;
            border-radius: 6px;
            padding: 12px 25px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        
        .cart-btn:hover {
            background: #2980b9;
        }
        
        .cart-btn:disabled {
            background: #bdc3c7;
            cursor: not-allowed;
        }
        
        .clear-cart-btn {
            flex: 1;
            background: #e74c3c;
            color: white;
            border: none;
            border-radius: 6px;
            padding: 12px 25px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        
        .clear-cart-btn:hover {
            background: #c0392b;
        }
        
        .clear-cart-btn:disabled {
            background: #bdc3c7;
            cursor: not-allowed;
        }
        
        .notification {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background: #2ecc71;
            color: white;
            padding: 15px 25px;
            border-radius: 6px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            display: flex;
            align-items: center;
            gap: 10px;
            transform: translateY(100px);
            opacity: 0;
            transition: all 0.3s ease;
        }
        
        .notification.show {
            transform: translateY(0);
            opacity: 1;
        }
        
        @media (max-width: 768px) {
            .product-container {
                flex-direction: column;
            }
            
            .product-images, .product-details {
                padding: 20px;
            }
            
            .main-image {
                height: 300px;
            }
            
            .cart-icon {
                position: static;
                margin-top: 15px;
                justify-content: center;
            }
            
            .add-to-cart {
                flex-direction: column;
            }
        }